Fig. 216. — Diagram of the relations of the main splanchnic blood vessels 
on the sixth day of incubation. 
A. c., Coeliac artery. Adv., Vena advehens. All., Allantois. A.m., Mes- 
enteric artery. <Ao., Aorta. A. o. m., Omphalomesenteric artery. A. p., 
Pulmonary artery. A.sc., Sciatic artery. A.u. d., Right umbilical artery. 
A. u. s., Left umbilical artery. A. V., Vitelline arteries. Car. int., Internal 
carotid. Car. ext., External carotid. Cl., Cloaca. D.a., Ductus arteriosus. 
D. V., Ductus (meatus) venosus. Int., Intestine. J. e., External jugular 
vein. J. i., Internal jugular vein. Li., Liver. Scl., Subclavian artery. V. 
ce. a., Anterior vena cava. V. c. i., Inferior Vena cava. V. c. p., Posterior 
cardinal vein. V.m., Mesenteric vein. V. 0. m., Omphalomesenteric vein. 
Vp., Pulmonary vein. V.s’c., Subeardinal vein. V. s’cl., Subclavian vein. 
V. u. (s.), Umbilical vein (left). V. V., Vitelline vein. W. B., Wolffian 
body. Y.S., Yolk-sac. Y. St., Yolk-stalk. 
